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FFmpeg/libavformat/hlsenc.c
Derek Buitenhuis 2d417076a2 avformat/hlsenc: Add missing error check 
Reviewed-by: Steven Liu <lq@onvideo.cn>
Signed-off-by: Derek Buitenhuis <derek.buitenhuis@gmail.com>
2017-07-07 10:08:18 +08:00

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/*
* Apple HTTP Live Streaming segmenter
* Copyright (c) 2012, Luca Barbato
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "config.h"
#include <float.h>
#include <stdint.h>
#if HAVE_UNISTD_H
#include <unistd.h>
#endif
#if CONFIG_GCRYPT
#include <gcrypt.h>
#elif CONFIG_OPENSSL
#include <openssl/rand.h>
#endif
#include "libavutil/avassert.h"
#include "libavutil/mathematics.h"
#include "libavutil/parseutils.h"
#include "libavutil/avstring.h"
#include "libavutil/intreadwrite.h"
#include "libavutil/random_seed.h"
#include "libavutil/opt.h"
#include "libavutil/log.h"
#include "libavutil/time_internal.h"
#include "avformat.h"
#include "avio_internal.h"
#include "internal.h"
#include "os_support.h"
typedef enum {
HLS_START_SEQUENCE_AS_START_NUMBER = 0,
HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH = 1,
HLS_START_SEQUENCE_AS_FORMATTED_DATETIME = 2, // YYYYMMDDhhmmss
} StartSequenceSourceType;
#define KEYSIZE 16
#define LINE_BUFFER_SIZE 1024
#define HLS_MICROSECOND_UNIT 1000000
typedef struct HLSSegment {
char filename[1024];
char sub_filename[1024];
double duration; /* in seconds */
int discont;
int64_t pos;
int64_t size;
char key_uri[LINE_BUFFER_SIZE + 1];
char iv_string[KEYSIZE*2 + 1];
struct HLSSegment *next;
} HLSSegment;
typedef enum HLSFlags {
// Generate a single media file and use byte ranges in the playlist.
HLS_SINGLE_FILE = (1 << 0),
HLS_DELETE_SEGMENTS = (1 << 1),
HLS_ROUND_DURATIONS = (1 << 2),
HLS_DISCONT_START = (1 << 3),
HLS_OMIT_ENDLIST = (1 << 4),
HLS_SPLIT_BY_TIME = (1 << 5),
HLS_APPEND_LIST = (1 << 6),
HLS_PROGRAM_DATE_TIME = (1 << 7),
HLS_SECOND_LEVEL_SEGMENT_INDEX = (1 << 8), // include segment index in segment filenames when use_localtime e.g.: %%03d
HLS_SECOND_LEVEL_SEGMENT_DURATION = (1 << 9), // include segment duration (microsec) in segment filenames when use_localtime e.g.: %%09t
HLS_SECOND_LEVEL_SEGMENT_SIZE = (1 << 10), // include segment size (bytes) in segment filenames when use_localtime e.g.: %%014s
HLS_TEMP_FILE = (1 << 11),
} HLSFlags;
typedef enum {
SEGMENT_TYPE_MPEGTS,
SEGMENT_TYPE_FMP4,
} SegmentType;
typedef enum {
PLAYLIST_TYPE_NONE,
PLAYLIST_TYPE_EVENT,
PLAYLIST_TYPE_VOD,
PLAYLIST_TYPE_NB,
} PlaylistType;
typedef struct HLSContext {
const AVClass *class; // Class for private options.
unsigned number;
int64_t sequence;
int64_t start_sequence;
uint32_t start_sequence_source_type; // enum StartSequenceSourceType
AVOutputFormat *oformat;
AVOutputFormat *vtt_oformat;
AVFormatContext *avf;
AVFormatContext *vtt_avf;
float time; // Set by a private option.
float init_time; // Set by a private option.
int max_nb_segments; // Set by a private option.
#if FF_API_HLS_WRAP
int wrap; // Set by a private option.
#endif
uint32_t flags; // enum HLSFlags
uint32_t pl_type; // enum PlaylistType
char *segment_filename;
char *fmp4_init_filename;
int segment_type;
int fmp4_init_mode;
int use_localtime; ///< flag to expand filename with localtime
int use_localtime_mkdir;///< flag to mkdir dirname in timebased filename
int allowcache;
int64_t recording_time;
int has_video;
int has_subtitle;
int new_start;
double dpp; // duration per packet
int64_t start_pts;
int64_t end_pts;
double duration; // last segment duration computed so far, in seconds
int64_t start_pos; // last segment starting position
int64_t size; // last segment size
int64_t max_seg_size; // every segment file max size
int nb_entries;
int discontinuity_set;
int discontinuity;
HLSSegment *segments;
HLSSegment *last_segment;
HLSSegment *old_segments;
char *basename;
char *vtt_basename;
char *vtt_m3u8_name;
char *baseurl;
char *format_options_str;
char *vtt_format_options_str;
char *subtitle_filename;
AVDictionary *format_options;
int encrypt;
char *key;
char *key_url;
char *iv;
char *key_basename;
char *key_info_file;
char key_file[LINE_BUFFER_SIZE + 1];
char key_uri[LINE_BUFFER_SIZE + 1];
char key_string[KEYSIZE*2 + 1];
char iv_string[KEYSIZE*2 + 1];
AVDictionary *vtt_format_options;
char *method;
double initial_prog_date_time;
char current_segment_final_filename_fmt[1024]; // when renaming segments
} HLSContext;
static int get_int_from_double(double val)
{
return (int)((val - (int)val) >= 0.001) ? (int)(val + 1) : (int)val;
}
static int mkdir_p(const char *path) {
int ret = 0;
char *temp = av_strdup(path);
char *pos = temp;
char tmp_ch = '\0';
if (!path || !temp) {
return -1;
}
if (!strncmp(temp, "/", 1) || !strncmp(temp, "\\", 1)) {
pos++;
} else if (!strncmp(temp, "./", 2) || !strncmp(temp, ".\\", 2)) {
pos += 2;
}
for ( ; *pos != '\0'; ++pos) {
if (*pos == '/' || *pos == '\\') {
tmp_ch = *pos;
*pos = '\0';
ret = mkdir(temp, 0755);
*pos = tmp_ch;
}
}
if ((*(pos - 1) != '/') || (*(pos - 1) != '\\')) {
ret = mkdir(temp, 0755);
}
av_free(temp);
return ret;
}
static int replace_int_data_in_filename(char *buf, int buf_size, const char *filename, char placeholder, int64_t number)
{
const char *p;
char *q, buf1[20], c;
int nd, len, addchar_count;
int found_count = 0;
q = buf;
p = filename;
for (;;) {
c = *p;
if (c == '\0')
break;
if (c == '%' && *(p+1) == '%') // %%
addchar_count = 2;
else if (c == '%' && (av_isdigit(*(p+1)) || *(p+1) == placeholder)) {
nd = 0;
addchar_count = 1;
while (av_isdigit(*(p + addchar_count))) {
nd = nd * 10 + *(p + addchar_count) - '0';
addchar_count++;
}
if (*(p + addchar_count) == placeholder) {
len = snprintf(buf1, sizeof(buf1), "%0*"PRId64, (number < 0) ? nd : nd++, number);
if (len < 1) // returned error or empty buf1
goto fail;
if ((q - buf + len) > buf_size - 1)
goto fail;
memcpy(q, buf1, len);
q += len;
p += (addchar_count + 1);
addchar_count = 0;
found_count++;
}
} else
addchar_count = 1;
while (addchar_count--)
if ((q - buf) < buf_size - 1)
*q++ = *p++;
else
goto fail;
}
*q = '\0';
return found_count;
fail:
*q = '\0';
return -1;
}
static void write_styp(AVIOContext *pb)
{
avio_wb32(pb, 24);
ffio_wfourcc(pb, "styp");
ffio_wfourcc(pb, "msdh");
avio_wb32(pb, 0); /* minor */
ffio_wfourcc(pb, "msdh");
ffio_wfourcc(pb, "msix");
}
static int hls_delete_old_segments(AVFormatContext *s, HLSContext *hls) {
HLSSegment *segment, *previous_segment = NULL;
float playlist_duration = 0.0f;
int ret = 0, path_size, sub_path_size;
char *dirname = NULL, *p, *sub_path;
char *path = NULL;
AVDictionary *options = NULL;
AVIOContext *out = NULL;
const char *proto = NULL;
segment = hls->segments;
while (segment) {
playlist_duration += segment->duration;
segment = segment->next;
}
segment = hls->old_segments;
while (segment) {
playlist_duration -= segment->duration;
previous_segment = segment;
segment = previous_segment->next;
if (playlist_duration <= -previous_segment->duration) {
previous_segment->next = NULL;
break;
}
}
if (segment && !hls->use_localtime_mkdir) {
if (hls->segment_filename) {
dirname = av_strdup(hls->segment_filename);
} else {
dirname = av_strdup(hls->avf->filename);
}
if (!dirname) {
ret = AVERROR(ENOMEM);
goto fail;
}
p = (char *)av_basename(dirname);
*p = '\0';
}
while (segment) {
av_log(hls, AV_LOG_DEBUG, "deleting old segment %s\n",
segment->filename);
path_size = (hls->use_localtime_mkdir ? 0 : strlen(dirname)) + strlen(segment->filename) + 1;
path = av_malloc(path_size);
if (!path) {
ret = AVERROR(ENOMEM);
goto fail;
}
if (hls->use_localtime_mkdir)
av_strlcpy(path, segment->filename, path_size);
else { // segment->filename contains basename only
av_strlcpy(path, dirname, path_size);
av_strlcat(path, segment->filename, path_size);
}
proto = avio_find_protocol_name(s->filename);
if (hls->method || (proto && !av_strcasecmp(proto, "http"))) {
av_dict_set(&options, "method", "DELETE", 0);
if ((ret = hls->avf->io_open(hls->avf, &out, path, AVIO_FLAG_WRITE, &options)) < 0)
goto fail;
ff_format_io_close(hls->avf, &out);
} else if (unlink(path) < 0) {
av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
path, strerror(errno));
}
if ((segment->sub_filename[0] != '\0')) {
sub_path_size = strlen(segment->sub_filename) + 1 + (dirname ? strlen(dirname) : 0);
sub_path = av_malloc(sub_path_size);
if (!sub_path) {
ret = AVERROR(ENOMEM);
goto fail;
}
av_strlcpy(sub_path, dirname, sub_path_size);
av_strlcat(sub_path, segment->sub_filename, sub_path_size);
if (hls->method || (proto && !av_strcasecmp(proto, "http"))) {
av_dict_set(&options, "method", "DELETE", 0);
if ((ret = hls->avf->io_open(hls->avf, &out, sub_path, AVIO_FLAG_WRITE, &options)) < 0) {
av_free(sub_path);
goto fail;
}
ff_format_io_close(hls->avf, &out);
} else if (unlink(sub_path) < 0) {
av_log(hls, AV_LOG_ERROR, "failed to delete old segment %s: %s\n",
sub_path, strerror(errno));
}
av_free(sub_path);
}
av_freep(&path);
previous_segment = segment;
segment = previous_segment->next;
av_free(previous_segment);
}
fail:
av_free(path);
av_free(dirname);
return ret;
}
static int randomize(uint8_t *buf, int len)
{
#if CONFIG_GCRYPT
gcry_randomize(buf, len, GCRY_VERY_STRONG_RANDOM);
return 0;
#elif CONFIG_OPENSSL
if (RAND_bytes(buf, len))
return 0;
#else
return AVERROR(ENOSYS);
#endif
return AVERROR(EINVAL);
}
static int do_encrypt(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
int ret;
int len;
AVIOContext *pb;
uint8_t key[KEYSIZE];
len = strlen(hls->basename) + 4 + 1;
hls->key_basename = av_mallocz(len);
if (!hls->key_basename)
return AVERROR(ENOMEM);
av_strlcpy(hls->key_basename, s->filename, len);
av_strlcat(hls->key_basename, ".key", len);
if (hls->key_url) {
av_strlcpy(hls->key_file, hls->key_url, sizeof(hls->key_file));
av_strlcpy(hls->key_uri, hls->key_url, sizeof(hls->key_uri));
} else {
av_strlcpy(hls->key_file, hls->key_basename, sizeof(hls->key_file));
av_strlcpy(hls->key_uri, hls->key_basename, sizeof(hls->key_uri));
}
if (!*hls->iv_string) {
uint8_t iv[16] = { 0 };
char buf[33];
if (!hls->iv) {
AV_WB64(iv + 8, hls->sequence);
} else {
memcpy(iv, hls->iv, sizeof(iv));
}
ff_data_to_hex(buf, iv, sizeof(iv), 0);
buf[32] = '\0';
memcpy(hls->iv_string, buf, sizeof(hls->iv_string));
}
if (!*hls->key_uri) {
av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
return AVERROR(EINVAL);
}
if (!*hls->key_file) {
av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
return AVERROR(EINVAL);
}
if (!*hls->key_string) {
if (!hls->key) {
if ((ret = randomize(key, sizeof(key))) < 0) {
av_log(s, AV_LOG_ERROR, "Cannot generate a strong random key\n");
return ret;
}
} else {
memcpy(key, hls->key, sizeof(key));
}
ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_WRITE, NULL)) < 0)
return ret;
avio_seek(pb, 0, SEEK_CUR);
avio_write(pb, key, KEYSIZE);
avio_close(pb);
}
return 0;
}
static int hls_encryption_start(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
int ret;
AVIOContext *pb;
uint8_t key[KEYSIZE];
if ((ret = s->io_open(s, &pb, hls->key_info_file, AVIO_FLAG_READ, NULL)) < 0) {
av_log(hls, AV_LOG_ERROR,
"error opening key info file %s\n", hls->key_info_file);
return ret;
}
ff_get_line(pb, hls->key_uri, sizeof(hls->key_uri));
hls->key_uri[strcspn(hls->key_uri, "\r\n")] = '\0';
ff_get_line(pb, hls->key_file, sizeof(hls->key_file));
hls->key_file[strcspn(hls->key_file, "\r\n")] = '\0';
ff_get_line(pb, hls->iv_string, sizeof(hls->iv_string));
hls->iv_string[strcspn(hls->iv_string, "\r\n")] = '\0';
ff_format_io_close(s, &pb);
if (!*hls->key_uri) {
av_log(hls, AV_LOG_ERROR, "no key URI specified in key info file\n");
return AVERROR(EINVAL);
}
if (!*hls->key_file) {
av_log(hls, AV_LOG_ERROR, "no key file specified in key info file\n");
return AVERROR(EINVAL);
}
if ((ret = s->io_open(s, &pb, hls->key_file, AVIO_FLAG_READ, NULL)) < 0) {
av_log(hls, AV_LOG_ERROR, "error opening key file %s\n", hls->key_file);
return ret;
}
ret = avio_read(pb, key, sizeof(key));
ff_format_io_close(s, &pb);
if (ret != sizeof(key)) {
av_log(hls, AV_LOG_ERROR, "error reading key file %s\n", hls->key_file);
if (ret >= 0 || ret == AVERROR_EOF)
ret = AVERROR(EINVAL);
return ret;
}
ff_data_to_hex(hls->key_string, key, sizeof(key), 0);
return 0;
}
static int read_chomp_line(AVIOContext *s, char *buf, int maxlen)
{
int len = ff_get_line(s, buf, maxlen);
while (len > 0 && av_isspace(buf[len - 1]))
buf[--len] = '\0';
return len;
}
static int hls_mux_init(AVFormatContext *s)
{
AVDictionary *options = NULL;
HLSContext *hls = s->priv_data;
AVFormatContext *oc;
AVFormatContext *vtt_oc = NULL;
int i, ret;
ret = avformat_alloc_output_context2(&hls->avf, hls->oformat, NULL, NULL);
if (ret < 0)
return ret;
oc = hls->avf;
oc->filename[0] = '\0';
oc->oformat = hls->oformat;
oc->interrupt_callback = s->interrupt_callback;
oc->max_delay = s->max_delay;
oc->opaque = s->opaque;
oc->io_open = s->io_open;
oc->io_close = s->io_close;
av_dict_copy(&oc->metadata, s->metadata, 0);
if(hls->vtt_oformat) {
ret = avformat_alloc_output_context2(&hls->vtt_avf, hls->vtt_oformat, NULL, NULL);
if (ret < 0)
return ret;
vtt_oc = hls->vtt_avf;
vtt_oc->oformat = hls->vtt_oformat;
av_dict_copy(&vtt_oc->metadata, s->metadata, 0);
}
for (i = 0; i < s->nb_streams; i++) {
AVStream *st;
AVFormatContext *loc;
if (s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE)
loc = vtt_oc;
else
loc = oc;
if (!(st = avformat_new_stream(loc, NULL)))
return AVERROR(ENOMEM);
avcodec_parameters_copy(st->codecpar, s->streams[i]->codecpar);
if (!oc->oformat->codec_tag ||
av_codec_get_id (oc->oformat->codec_tag, s->streams[i]->codecpar->codec_tag) == st->codecpar->codec_id ||
av_codec_get_tag(oc->oformat->codec_tag, s->streams[i]->codecpar->codec_id) <= 0) {
st->codecpar->codec_tag = s->streams[i]->codecpar->codec_tag;
} else {
st->codecpar->codec_tag = 0;
}
st->sample_aspect_ratio = s->streams[i]->sample_aspect_ratio;
st->time_base = s->streams[i]->time_base;
av_dict_copy(&st->metadata, s->streams[i]->metadata, 0);
}
hls->start_pos = 0;
hls->new_start = 1;
hls->fmp4_init_mode = 0;
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
hls->fmp4_init_mode = 1;
if ((ret = s->io_open(s, &oc->pb, hls->fmp4_init_filename, AVIO_FLAG_WRITE, NULL)) < 0) {
av_log(s, AV_LOG_ERROR, "Failed to open segment '%s'\n", hls->fmp4_init_filename);
return ret;
}
if (hls->format_options_str) {
ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n",
hls->format_options_str);
return ret;
}
}
av_dict_copy(&options, hls->format_options, 0);
av_dict_set(&options, "fflags", "-autobsf", 0);
av_dict_set(&options, "movflags", "frag_custom+dash+delay_moov", 0);
ret = avformat_init_output(oc, &options);
if (ret < 0)
return ret;
if (av_dict_count(options)) {
av_log(s, AV_LOG_ERROR, "Some of the provided format options in '%s' are not recognized\n", hls->format_options_str);
av_dict_free(&options);
return AVERROR(EINVAL);
}
av_dict_free(&options);
}
return 0;
}
static HLSSegment *find_segment_by_filename(HLSSegment *segment, const char *filename)
{
while (segment) {
if (!av_strcasecmp(segment->filename,filename))
return segment;
segment = segment->next;
}
return (HLSSegment *) NULL;
}
static int sls_flags_filename_process(struct AVFormatContext *s, HLSContext *hls, HLSSegment *en, double duration,
int64_t pos, int64_t size)
{
if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
strlen(hls->current_segment_final_filename_fmt)) {
av_strlcpy(hls->avf->filename, hls->current_segment_final_filename_fmt, sizeof(hls->avf->filename));
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
char * filename = av_strdup(hls->avf->filename); // %%s will be %s after strftime
if (!filename) {
av_free(en);
return AVERROR(ENOMEM);
}
if (replace_int_data_in_filename(hls->avf->filename, sizeof(hls->avf->filename),
filename, 's', pos + size) < 1) {
av_log(hls, AV_LOG_ERROR,
"Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_size flag\n",
filename);
av_free(filename);
av_free(en);
return AVERROR(EINVAL);
}
av_free(filename);
}
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
char * filename = av_strdup(hls->avf->filename); // %%t will be %t after strftime
if (!filename) {
av_free(en);
return AVERROR(ENOMEM);
}
if (replace_int_data_in_filename(hls->avf->filename, sizeof(hls->avf->filename),
filename, 't', (int64_t)round(duration * HLS_MICROSECOND_UNIT)) < 1) {
av_log(hls, AV_LOG_ERROR,
"Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_time flag\n",
filename);
av_free(filename);
av_free(en);
return AVERROR(EINVAL);
}
av_free(filename);
}
}
return 0;
}
static int sls_flag_check_duration_size_index(HLSContext *hls)
{
int ret = 0;
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_duration hls_flag requires use_localtime to be true\n");
ret = AVERROR(EINVAL);
}
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_size hls_flag requires use_localtime to be true\n");
ret = AVERROR(EINVAL);
}
if (hls->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_index hls_flag requires use_localtime to be true\n");
ret = AVERROR(EINVAL);
}
return ret;
}
static int sls_flag_check_duration_size(HLSContext *hls)
{
const char *proto = avio_find_protocol_name(hls->basename);
int segment_renaming_ok = proto && !strcmp(proto, "file");
int ret = 0;
if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) && !segment_renaming_ok) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_duration hls_flag works only with file protocol segment names\n");
ret = AVERROR(EINVAL);
}
if ((hls->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) && !segment_renaming_ok) {
av_log(hls, AV_LOG_ERROR,
"second_level_segment_size hls_flag works only with file protocol segment names\n");
ret = AVERROR(EINVAL);
}
return ret;
}
static void sls_flag_file_rename(HLSContext *hls, char *old_filename) {
if ((hls->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) &&
strlen(hls->current_segment_final_filename_fmt)) {
ff_rename(old_filename, hls->avf->filename, hls);
}
}
static int sls_flag_use_localtime_filename(AVFormatContext *oc, HLSContext *c)
{
if (c->flags & HLS_SECOND_LEVEL_SEGMENT_INDEX) {
char * filename = av_strdup(oc->filename); // %%d will be %d after strftime
if (!filename)
return AVERROR(ENOMEM);
if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
#if FF_API_HLS_WRAP
filename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
#else
filename, 'd', c->sequence) < 1) {
#endif
av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_index flag\n",
filename);
av_free(filename);
return AVERROR(EINVAL);
}
av_free(filename);
}
if (c->flags & (HLS_SECOND_LEVEL_SEGMENT_SIZE | HLS_SECOND_LEVEL_SEGMENT_DURATION)) {
av_strlcpy(c->current_segment_final_filename_fmt, oc->filename,
sizeof(c->current_segment_final_filename_fmt));
if (c->flags & HLS_SECOND_LEVEL_SEGMENT_SIZE) {
char * filename = av_strdup(oc->filename); // %%s will be %s after strftime
if (!filename)
return AVERROR(ENOMEM);
if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename), filename, 's', 0) < 1) {
av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_size flag\n",
filename);
av_free(filename);
return AVERROR(EINVAL);
}
av_free(filename);
}
if (c->flags & HLS_SECOND_LEVEL_SEGMENT_DURATION) {
char * filename = av_strdup(oc->filename); // %%t will be %t after strftime
if (!filename)
return AVERROR(ENOMEM);
if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename), filename, 't', 0) < 1) {
av_log(c, AV_LOG_ERROR, "Invalid second level segment filename template '%s', "
"you can try to remove second_level_segment_time flag\n",
filename);
av_free(filename);
return AVERROR(EINVAL);
}
av_free(filename);
}
}
return 0;
}
/* Create a new segment and append it to the segment list */
static int hls_append_segment(struct AVFormatContext *s, HLSContext *hls, double duration,
int64_t pos, int64_t size)
{
HLSSegment *en = av_malloc(sizeof(*en));
const char *filename;
int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
int ret;
if (!en)
return AVERROR(ENOMEM);
ret = sls_flags_filename_process(s, hls, en, duration, pos, size);
if (ret < 0) {
return ret;
}
filename = av_basename(hls->avf->filename);
if (hls->use_localtime_mkdir) {
filename = hls->avf->filename;
}
if ((find_segment_by_filename(hls->segments, filename) || find_segment_by_filename(hls->old_segments, filename))
&& !byterange_mode) {
av_log(hls, AV_LOG_WARNING, "Duplicated segment filename detected: %s\n", filename);
}
av_strlcpy(en->filename, filename, sizeof(en->filename));
if(hls->has_subtitle)
av_strlcpy(en->sub_filename, av_basename(hls->vtt_avf->filename), sizeof(en->sub_filename));
else
en->sub_filename[0] = '\0';
en->duration = duration;
en->pos = pos;
en->size = size;
en->next = NULL;
en->discont = 0;
if (hls->discontinuity) {
en->discont = 1;
hls->discontinuity = 0;
}
if (hls->key_info_file || hls->encrypt) {
av_strlcpy(en->key_uri, hls->key_uri, sizeof(en->key_uri));
av_strlcpy(en->iv_string, hls->iv_string, sizeof(en->iv_string));
}
if (!hls->segments)
hls->segments = en;
else
hls->last_segment->next = en;
hls->last_segment = en;
// EVENT or VOD playlists imply sliding window cannot be used
if (hls->pl_type != PLAYLIST_TYPE_NONE)
hls->max_nb_segments = 0;
if (hls->max_nb_segments && hls->nb_entries >= hls->max_nb_segments) {
en = hls->segments;
hls->initial_prog_date_time += en->duration;
hls->segments = en->next;
if (en && hls->flags & HLS_DELETE_SEGMENTS &&
#if FF_API_HLS_WRAP
!(hls->flags & HLS_SINGLE_FILE || hls->wrap)) {
#else
!(hls->flags & HLS_SINGLE_FILE)) {
#endif
en->next = hls->old_segments;
hls->old_segments = en;
if ((ret = hls_delete_old_segments(s, hls)) < 0)
return ret;
} else
av_free(en);
} else
hls->nb_entries++;
if (hls->max_seg_size > 0) {
return 0;
}
hls->sequence++;
return 0;
}
static int parse_playlist(AVFormatContext *s, const char *url)
{
HLSContext *hls = s->priv_data;
AVIOContext *in;
int ret = 0, is_segment = 0;
int64_t new_start_pos;
char line[1024];
const char *ptr;
const char *end;
if ((ret = ffio_open_whitelist(&in, url, AVIO_FLAG_READ,
&s->interrupt_callback, NULL,
s->protocol_whitelist, s->protocol_blacklist)) < 0)
return ret;
read_chomp_line(in, line, sizeof(line));
if (strcmp(line, "#EXTM3U")) {
ret = AVERROR_INVALIDDATA;
goto fail;
}
hls->discontinuity = 0;
while (!avio_feof(in)) {
read_chomp_line(in, line, sizeof(line));
if (av_strstart(line, "#EXT-X-MEDIA-SEQUENCE:", &ptr)) {
int64_t tmp_sequence = strtoll(ptr, NULL, 10);
if (tmp_sequence < hls->sequence)
av_log(hls, AV_LOG_VERBOSE,
"Found playlist sequence number was smaller """
"than specified start sequence number: %"PRId64" < %"PRId64", "
"omitting\n", tmp_sequence, hls->start_sequence);
else {
av_log(hls, AV_LOG_DEBUG, "Found playlist sequence number: %"PRId64"\n", tmp_sequence);
hls->sequence = tmp_sequence;
}
} else if (av_strstart(line, "#EXT-X-DISCONTINUITY", &ptr)) {
is_segment = 1;
hls->discontinuity = 1;
} else if (av_strstart(line, "#EXTINF:", &ptr)) {
is_segment = 1;
hls->duration = atof(ptr);
} else if (av_stristart(line, "#EXT-X-KEY:", &ptr)) {
ptr = av_stristr(line, "URI=\"");
if (ptr) {
ptr += strlen("URI=\"");
end = av_stristr(ptr, ",");
if (end) {
av_strlcpy(hls->key_uri, ptr, end - ptr);
} else {
av_strlcpy(hls->key_uri, ptr, sizeof(hls->key_uri));
}
}
ptr = av_stristr(line, "IV=0x");
if (ptr) {
ptr += strlen("IV=0x");
end = av_stristr(ptr, ",");
if (end) {
av_strlcpy(hls->iv_string, ptr, end - ptr);
} else {
av_strlcpy(hls->iv_string, ptr, sizeof(hls->iv_string));
}
}
} else if (av_strstart(line, "#", NULL)) {
continue;
} else if (line[0]) {
if (is_segment) {
is_segment = 0;
new_start_pos = avio_tell(hls->avf->pb);
hls->size = new_start_pos - hls->start_pos;
av_strlcpy(hls->avf->filename, line, sizeof(line));
ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
if (ret < 0)
goto fail;
hls->start_pos = new_start_pos;
}
}
}
fail:
avio_close(in);
return ret;
}
static void hls_free_segments(HLSSegment *p)
{
HLSSegment *en;
while(p) {
en = p;
p = p->next;
av_free(en);
}
}
static void set_http_options(AVFormatContext *s, AVDictionary **options, HLSContext *c)
{
const char *proto = avio_find_protocol_name(s->filename);
int http_base_proto = proto ? (!av_strcasecmp(proto, "http") || !av_strcasecmp(proto, "https")) : 0;
if (c->method) {
av_dict_set(options, "method", c->method, 0);
} else if (http_base_proto) {
av_log(c, AV_LOG_WARNING, "No HTTP method set, hls muxer defaulting to method PUT.\n");
av_dict_set(options, "method", "PUT", 0);
}
}
static void write_m3u8_head_block(HLSContext *hls, AVIOContext *out, int version,
int target_duration, int64_t sequence)
{
avio_printf(out, "#EXTM3U\n");
avio_printf(out, "#EXT-X-VERSION:%d\n", version);
if (hls->allowcache == 0 || hls->allowcache == 1) {
avio_printf(out, "#EXT-X-ALLOW-CACHE:%s\n", hls->allowcache == 0 ? "NO" : "YES");
}
avio_printf(out, "#EXT-X-TARGETDURATION:%d\n", target_duration);
avio_printf(out, "#EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
avio_printf(out, "#EXT-X-MAP:URI=\"%s\"\n", hls->fmp4_init_filename);
}
av_log(hls, AV_LOG_VERBOSE, "EXT-X-MEDIA-SEQUENCE:%"PRId64"\n", sequence);
}
static void hls_rename_temp_file(AVFormatContext *s, AVFormatContext *oc)
{
size_t len = strlen(oc->filename);
char final_filename[sizeof(oc->filename)];
av_strlcpy(final_filename, oc->filename, len);
final_filename[len-4] = '\0';
ff_rename(oc->filename, final_filename, s);
oc->filename[len-4] = '\0';
}
static int hls_window(AVFormatContext *s, int last)
{
HLSContext *hls = s->priv_data;
HLSSegment *en;
int target_duration = 0;
int ret = 0;
AVIOContext *out = NULL;
AVIOContext *sub_out = NULL;
char temp_filename[1024];
int64_t sequence = FFMAX(hls->start_sequence, hls->sequence - hls->nb_entries);
int version = 3;
const char *proto = avio_find_protocol_name(s->filename);
int use_rename = proto && !strcmp(proto, "file");
static unsigned warned_non_file;
char *key_uri = NULL;
char *iv_string = NULL;
AVDictionary *options = NULL;
double prog_date_time = hls->initial_prog_date_time;
int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
if (byterange_mode) {
version = 4;
sequence = 0;
}
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
version = 7;
}
if (!use_rename && !warned_non_file++)
av_log(s, AV_LOG_ERROR, "Cannot use rename on non file protocol, this may lead to races and temporary partial files\n");
set_http_options(s, &options, hls);
snprintf(temp_filename, sizeof(temp_filename), use_rename ? "%s.tmp" : "%s", s->filename);
if ((ret = s->io_open(s, &out, temp_filename, AVIO_FLAG_WRITE, &options)) < 0)
goto fail;
for (en = hls->segments; en; en = en->next) {
if (target_duration <= en->duration)
target_duration = get_int_from_double(en->duration);
}
hls->discontinuity_set = 0;
write_m3u8_head_block(hls, out, version, target_duration, sequence);
if (hls->pl_type == PLAYLIST_TYPE_EVENT) {
avio_printf(out, "#EXT-X-PLAYLIST-TYPE:EVENT\n");
} else if (hls->pl_type == PLAYLIST_TYPE_VOD) {
avio_printf(out, "#EXT-X-PLAYLIST-TYPE:VOD\n");
}
if((hls->flags & HLS_DISCONT_START) && sequence==hls->start_sequence && hls->discontinuity_set==0 ){
avio_printf(out, "#EXT-X-DISCONTINUITY\n");
hls->discontinuity_set = 1;
}
for (en = hls->segments; en; en = en->next) {
if ((hls->encrypt || hls->key_info_file) && (!key_uri || strcmp(en->key_uri, key_uri) ||
av_strcasecmp(en->iv_string, iv_string))) {
avio_printf(out, "#EXT-X-KEY:METHOD=AES-128,URI=\"%s\"", en->key_uri);
if (*en->iv_string)
avio_printf(out, ",IV=0x%s", en->iv_string);
avio_printf(out, "\n");
key_uri = en->key_uri;
iv_string = en->iv_string;
}
if (en->discont) {
avio_printf(out, "#EXT-X-DISCONTINUITY\n");
}
if (hls->flags & HLS_ROUND_DURATIONS)
avio_printf(out, "#EXTINF:%ld,\n", lrint(en->duration));
else
avio_printf(out, "#EXTINF:%f,\n", en->duration);
if (byterange_mode)
avio_printf(out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
en->size, en->pos);
if (hls->flags & HLS_PROGRAM_DATE_TIME) {
time_t tt, wrongsecs;
int milli;
struct tm *tm, tmpbuf;
char buf0[128], buf1[128];
tt = (int64_t)prog_date_time;
milli = av_clip(lrint(1000*(prog_date_time - tt)), 0, 999);
tm = localtime_r(&tt, &tmpbuf);
strftime(buf0, sizeof(buf0), "%Y-%m-%dT%H:%M:%S", tm);
if (!strftime(buf1, sizeof(buf1), "%z", tm) || buf1[1]<'0' ||buf1[1]>'2') {
int tz_min, dst = tm->tm_isdst;
tm = gmtime_r(&tt, &tmpbuf);
tm->tm_isdst = dst;
wrongsecs = mktime(tm);
tz_min = (abs(wrongsecs - tt) + 30) / 60;
snprintf(buf1, sizeof(buf1),
"%c%02d%02d",
wrongsecs <= tt ? '+' : '-',
tz_min / 60,
tz_min % 60);
}
avio_printf(out, "#EXT-X-PROGRAM-DATE-TIME:%s.%03d%s\n", buf0, milli, buf1);
prog_date_time += en->duration;
}
if (hls->baseurl)
avio_printf(out, "%s", hls->baseurl);
avio_printf(out, "%s\n", en->filename);
}
if (last && (hls->flags & HLS_OMIT_ENDLIST)==0)
avio_printf(out, "#EXT-X-ENDLIST\n");
if( hls->vtt_m3u8_name ) {
if ((ret = s->io_open(s, &sub_out, hls->vtt_m3u8_name, AVIO_FLAG_WRITE, &options)) < 0)
goto fail;
write_m3u8_head_block(hls, sub_out, version, target_duration, sequence);
for (en = hls->segments; en; en = en->next) {
avio_printf(sub_out, "#EXTINF:%f,\n", en->duration);
if (byterange_mode)
avio_printf(sub_out, "#EXT-X-BYTERANGE:%"PRIi64"@%"PRIi64"\n",
en->size, en->pos);
if (hls->baseurl)
avio_printf(sub_out, "%s", hls->baseurl);
avio_printf(sub_out, "%s\n", en->sub_filename);
}
if (last)
avio_printf(sub_out, "#EXT-X-ENDLIST\n");
}
fail:
av_dict_free(&options);
ff_format_io_close(s, &out);
ff_format_io_close(s, &sub_out);
if (ret >= 0 && use_rename)
ff_rename(temp_filename, s->filename, s);
return ret;
}
static int hls_start(AVFormatContext *s)
{
HLSContext *c = s->priv_data;
AVFormatContext *oc = c->avf;
AVFormatContext *vtt_oc = c->vtt_avf;
AVDictionary *options = NULL;
char *filename, iv_string[KEYSIZE*2 + 1];
int err = 0;
if (c->flags & HLS_SINGLE_FILE) {
av_strlcpy(oc->filename, c->basename,
sizeof(oc->filename));
if (c->vtt_basename)
av_strlcpy(vtt_oc->filename, c->vtt_basename,
sizeof(vtt_oc->filename));
} else if (c->max_seg_size > 0) {
if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
#if FF_API_HLS_WRAP
c->basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
#else
c->basename, 'd', c->sequence) < 1) {
#endif
av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s', you can try to use -use_localtime 1 with it\n", c->basename);
return AVERROR(EINVAL);
}
} else {
if (c->use_localtime) {
time_t now0;
struct tm *tm, tmpbuf;
time(&now0);
tm = localtime_r(&now0, &tmpbuf);
if (!strftime(oc->filename, sizeof(oc->filename), c->basename, tm)) {
av_log(oc, AV_LOG_ERROR, "Could not get segment filename with use_localtime\n");
return AVERROR(EINVAL);
}
err = sls_flag_use_localtime_filename(oc, c);
if (err < 0) {
return AVERROR(ENOMEM);
}
if (c->use_localtime_mkdir) {
const char *dir;
char *fn_copy = av_strdup(oc->filename);
if (!fn_copy) {
return AVERROR(ENOMEM);
}
dir = av_dirname(fn_copy);
if (mkdir_p(dir) == -1 && errno != EEXIST) {
av_log(oc, AV_LOG_ERROR, "Could not create directory %s with use_localtime_mkdir\n", dir);
av_free(fn_copy);
return AVERROR(errno);
}
av_free(fn_copy);
}
} else if (replace_int_data_in_filename(oc->filename, sizeof(oc->filename),
#if FF_API_HLS_WRAP
c->basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
#else
c->basename, 'd', c->sequence) < 1) {
#endif
av_log(oc, AV_LOG_ERROR, "Invalid segment filename template '%s' you can try to use -use_localtime 1 with it\n", c->basename);
return AVERROR(EINVAL);
}
if( c->vtt_basename) {
if (replace_int_data_in_filename(vtt_oc->filename, sizeof(vtt_oc->filename),
#if FF_API_HLS_WRAP
c->vtt_basename, 'd', c->wrap ? c->sequence % c->wrap : c->sequence) < 1) {
#else
c->vtt_basename, 'd', c->sequence) < 1) {
#endif
av_log(vtt_oc, AV_LOG_ERROR, "Invalid segment filename template '%s'\n", c->vtt_basename);
return AVERROR(EINVAL);
}
}
}
c->number++;
set_http_options(s, &options, c);
if (c->flags & HLS_TEMP_FILE) {
av_strlcat(oc->filename, ".tmp", sizeof(oc->filename));
}
if (c->key_info_file || c->encrypt) {
if (c->key_info_file && c->encrypt) {
av_log(s, AV_LOG_WARNING, "Cannot use both -hls_key_info_file and -hls_enc,"
" will use -hls_key_info_file priority\n");
}
if (c->key_info_file) {
if ((err = hls_encryption_start(s)) < 0)
goto fail;
} else {
if ((err = do_encrypt(s)) < 0)
goto fail;
}
if ((err = av_dict_set(&options, "encryption_key", c->key_string, 0))
< 0)
goto fail;
err = av_strlcpy(iv_string, c->iv_string, sizeof(iv_string));
if (!err)
snprintf(iv_string, sizeof(iv_string), "%032"PRIx64, c->sequence);
if ((err = av_dict_set(&options, "encryption_iv", iv_string, 0)) < 0)
goto fail;
filename = av_asprintf("crypto:%s", oc->filename);
if (!filename) {
err = AVERROR(ENOMEM);
goto fail;
}
err = s->io_open(s, &oc->pb, filename, AVIO_FLAG_WRITE, &options);
av_free(filename);
av_dict_free(&options);
if (err < 0)
return err;
} else
if ((err = s->io_open(s, &oc->pb, oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
goto fail;
if (c->vtt_basename) {
set_http_options(s, &options, c);
if ((err = s->io_open(s, &vtt_oc->pb, vtt_oc->filename, AVIO_FLAG_WRITE, &options)) < 0)
goto fail;
}
av_dict_free(&options);
if (c->segment_type == SEGMENT_TYPE_FMP4) {
write_styp(oc->pb);
} else {
/* We only require one PAT/PMT per segment. */
if (oc->oformat->priv_class && oc->priv_data) {
char period[21];
snprintf(period, sizeof(period), "%d", (INT_MAX / 2) - 1);
av_opt_set(oc->priv_data, "mpegts_flags", "resend_headers", 0);
av_opt_set(oc->priv_data, "sdt_period", period, 0);
av_opt_set(oc->priv_data, "pat_period", period, 0);
}
}
if (c->vtt_basename) {
err = avformat_write_header(vtt_oc,NULL);
if (err < 0)
return err;
}
return 0;
fail:
av_dict_free(&options);
return err;
}
static const char * get_default_pattern_localtime_fmt(void)
{
char b[21];
time_t t = time(NULL);
struct tm *p, tmbuf;
p = localtime_r(&t, &tmbuf);
// no %s support when strftime returned error or left format string unchanged
// also no %s support on MSVC, which invokes the invalid parameter handler on unsupported format strings, instead of returning an error
return (HAVE_LIBC_MSVCRT || !strftime(b, sizeof(b), "%s", p) || !strcmp(b, "%s")) ? "-%Y%m%d%H%M%S.ts" : "-%s.ts";
}
static int hls_write_header(AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
int ret, i;
char *p;
const char *pattern = "%d.ts";
const char *pattern_localtime_fmt = get_default_pattern_localtime_fmt();
const char *vtt_pattern = "%d.vtt";
AVDictionary *options = NULL;
int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
int basename_size;
int vtt_basename_size;
if (hls->segment_type == SEGMENT_TYPE_FMP4 && byterange_mode) {
av_log(s, AV_LOG_WARNING, "Have not support fmp4 byterange mode yet now\n");
return AVERROR_PATCHWELCOME;
}
if ((hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH) ||
(hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME)) {
time_t t = time(NULL); // we will need it in either case
if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH) {
hls->start_sequence = (int64_t)t;
} else if (hls->start_sequence_source_type == HLS_START_SEQUENCE_AS_FORMATTED_DATETIME) {
char b[15];
struct tm *p, tmbuf;
if (!(p = localtime_r(&t, &tmbuf)))
return AVERROR(ENOMEM);
if (!strftime(b, sizeof(b), "%Y%m%d%H%M%S", p))
return AVERROR(ENOMEM);
hls->start_sequence = strtoll(b, NULL, 10);
}
av_log(hls, AV_LOG_DEBUG, "start_number evaluated to %"PRId64"\n", hls->start_sequence);
}
hls->sequence = hls->start_sequence;
hls->recording_time = (hls->init_time ? hls->init_time : hls->time) * AV_TIME_BASE;
hls->start_pts = AV_NOPTS_VALUE;
hls->current_segment_final_filename_fmt[0] = '\0';
if (hls->flags & HLS_PROGRAM_DATE_TIME) {
time_t now0;
time(&now0);
hls->initial_prog_date_time = now0;
}
if (hls->format_options_str) {
ret = av_dict_parse_string(&hls->format_options, hls->format_options_str, "=", ":", 0);
if (ret < 0) {
av_log(s, AV_LOG_ERROR, "Could not parse format options list '%s'\n", hls->format_options_str);
goto fail;
}
}
for (i = 0; i < s->nb_streams; i++) {
hls->has_video +=
s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
hls->has_subtitle +=
s->streams[i]->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE;
}
if (hls->has_video > 1)
av_log(s, AV_LOG_WARNING,
"More than a single video stream present, "
"expect issues decoding it.\n");
if (hls->segment_type == SEGMENT_TYPE_FMP4) {
hls->oformat = av_guess_format("mp4", NULL, NULL);
} else {
hls->oformat = av_guess_format("mpegts", NULL, NULL);
}
if (!hls->oformat) {
ret = AVERROR_MUXER_NOT_FOUND;
goto fail;
}
if(hls->has_subtitle) {
hls->vtt_oformat = av_guess_format("webvtt", NULL, NULL);
if (!hls->oformat) {
ret = AVERROR_MUXER_NOT_FOUND;
goto fail;
}
}
if (hls->segment_filename) {
hls->basename = av_strdup(hls->segment_filename);
if (!hls->basename) {
ret = AVERROR(ENOMEM);
goto fail;
}
} else {
if (hls->flags & HLS_SINGLE_FILE)
pattern = ".ts";
if (hls->use_localtime) {
basename_size = strlen(s->filename) + strlen(pattern_localtime_fmt) + 1;
} else {
basename_size = strlen(s->filename) + strlen(pattern) + 1;
}
hls->basename = av_malloc(basename_size);
if (!hls->basename) {
ret = AVERROR(ENOMEM);
goto fail;
}
av_strlcpy(hls->basename, s->filename, basename_size);
p = strrchr(hls->basename, '.');
if (p)
*p = '\0';
if (hls->use_localtime) {
av_strlcat(hls->basename, pattern_localtime_fmt, basename_size);
} else {
av_strlcat(hls->basename, pattern, basename_size);
}
}
if (!hls->use_localtime) {
ret = sls_flag_check_duration_size_index(hls);
if (ret < 0) {
goto fail;
}
} else {
ret = sls_flag_check_duration_size(hls);
if (ret < 0) {
goto fail;
}
}
if(hls->has_subtitle) {
if (hls->flags & HLS_SINGLE_FILE)
vtt_pattern = ".vtt";
vtt_basename_size = strlen(s->filename) + strlen(vtt_pattern) + 1;
hls->vtt_basename = av_malloc(vtt_basename_size);
if (!hls->vtt_basename) {
ret = AVERROR(ENOMEM);
goto fail;
}
hls->vtt_m3u8_name = av_malloc(vtt_basename_size);
if (!hls->vtt_m3u8_name ) {
ret = AVERROR(ENOMEM);
goto fail;
}
av_strlcpy(hls->vtt_basename, s->filename, vtt_basename_size);
p = strrchr(hls->vtt_basename, '.');
if (p)
*p = '\0';
if( hls->subtitle_filename ) {
strcpy(hls->vtt_m3u8_name, hls->subtitle_filename);
} else {
strcpy(hls->vtt_m3u8_name, hls->vtt_basename);
av_strlcat(hls->vtt_m3u8_name, "_vtt.m3u8", vtt_basename_size);
}
av_strlcat(hls->vtt_basename, vtt_pattern, vtt_basename_size);
}
if ((ret = hls_mux_init(s)) < 0)
goto fail;
if (hls->flags & HLS_APPEND_LIST) {
parse_playlist(s, s->filename);
hls->discontinuity = 1;
if (hls->init_time > 0) {
av_log(s, AV_LOG_WARNING, "append_list mode does not support hls_init_time,"
" hls_init_time value will have no effect\n");
hls->init_time = 0;
hls->recording_time = hls->time * AV_TIME_BASE;
}
}
if (hls->segment_type != SEGMENT_TYPE_FMP4) {
if ((ret = hls_start(s)) < 0)
goto fail;
}
av_dict_copy(&options, hls->format_options, 0);
ret = avformat_write_header(hls->avf, &options);
if (av_dict_count(options)) {
av_log(s, AV_LOG_ERROR, "Some of provided format options in '%s' are not recognized\n", hls->format_options_str);
ret = AVERROR(EINVAL);
goto fail;
}
//av_assert0(s->nb_streams == hls->avf->nb_streams);
for (i = 0; i < s->nb_streams; i++) {
AVStream *inner_st;
AVStream *outer_st = s->streams[i];
if (hls->max_seg_size > 0) {
if ((outer_st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) &&
(outer_st->codecpar->bit_rate > hls->max_seg_size)) {
av_log(s, AV_LOG_WARNING, "Your video bitrate is bigger than hls_segment_size, "
"(%"PRId64 " > %"PRId64 "), the result maybe not be what you want.",
outer_st->codecpar->bit_rate, hls->max_seg_size);
}
}
if (outer_st->codecpar->codec_type != AVMEDIA_TYPE_SUBTITLE)
inner_st = hls->avf->streams[i];
else if (hls->vtt_avf)
inner_st = hls->vtt_avf->streams[0];
else {
/* We have a subtitle stream, when the user does not want one */
inner_st = NULL;
continue;
}
avpriv_set_pts_info(outer_st, inner_st->pts_wrap_bits, inner_st->time_base.num, inner_st->time_base.den);
}
fail:
av_dict_free(&options);
if (ret < 0) {
av_freep(&hls->basename);
av_freep(&hls->vtt_basename);
av_freep(&hls->key_basename);
if (hls->avf)
avformat_free_context(hls->avf);
if (hls->vtt_avf)
avformat_free_context(hls->vtt_avf);
}
return ret;
}
static int hls_write_packet(AVFormatContext *s, AVPacket *pkt)
{
HLSContext *hls = s->priv_data;
AVFormatContext *oc = NULL;
AVStream *st = s->streams[pkt->stream_index];
int64_t end_pts = hls->recording_time * hls->number;
int is_ref_pkt = 1;
int ret = 0, can_split = 1;
int stream_index = 0;
if (hls->sequence - hls->nb_entries > hls->start_sequence && hls->init_time > 0) {
/* reset end_pts, hls->recording_time at end of the init hls list */
int init_list_dur = hls->init_time * hls->nb_entries * AV_TIME_BASE;
int after_init_list_dur = (hls->sequence - hls->nb_entries ) * hls->time * AV_TIME_BASE;
hls->recording_time = hls->time * AV_TIME_BASE;
end_pts = init_list_dur + after_init_list_dur ;
}
if( st->codecpar->codec_type == AVMEDIA_TYPE_SUBTITLE ) {
oc = hls->vtt_avf;
stream_index = 0;
} else {
oc = hls->avf;
stream_index = pkt->stream_index;
}
if (hls->start_pts == AV_NOPTS_VALUE) {
hls->start_pts = pkt->pts;
hls->end_pts = pkt->pts;
}
if (hls->has_video) {
can_split = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO &&
((pkt->flags & AV_PKT_FLAG_KEY) || (hls->flags & HLS_SPLIT_BY_TIME));
is_ref_pkt = st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO;
}
if (pkt->pts == AV_NOPTS_VALUE)
is_ref_pkt = can_split = 0;
if (is_ref_pkt) {
if (hls->new_start) {
hls->new_start = 0;
hls->duration = (double)(pkt->pts - hls->end_pts)
* st->time_base.num / st->time_base.den;
hls->dpp = (double)(pkt->duration) * st->time_base.num / st->time_base.den;
} else {
if (pkt->duration) {
hls->duration += (double)(pkt->duration) * st->time_base.num / st->time_base.den;
} else {
av_log(s, AV_LOG_WARNING, "pkt->duration = 0, maybe the hls segment duration will not precise\n");
hls->duration = (double)(pkt->pts - hls->end_pts) * st->time_base.num / st->time_base.den;
}
}
}
if (hls->fmp4_init_mode || can_split && av_compare_ts(pkt->pts - hls->start_pts, st->time_base,
end_pts, AV_TIME_BASE_Q) >= 0) {
int64_t new_start_pos;
char *old_filename = av_strdup(hls->avf->filename);
int byterange_mode = (hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size > 0);
if (!old_filename) {
return AVERROR(ENOMEM);
}
av_write_frame(hls->avf, NULL); /* Flush any buffered data */
new_start_pos = avio_tell(hls->avf->pb);
hls->size = new_start_pos - hls->start_pos;
if (!byterange_mode) {
ff_format_io_close(s, &oc->pb);
if (hls->vtt_avf) {
ff_format_io_close(s, &hls->vtt_avf->pb);
}
}
if ((hls->flags & HLS_TEMP_FILE) && oc->filename[0]) {
if (!(hls->flags & HLS_SINGLE_FILE) || (hls->max_seg_size <= 0))
if ((hls->avf->oformat->priv_class && hls->avf->priv_data) && hls->segment_type != SEGMENT_TYPE_FMP4)
av_opt_set(hls->avf->priv_data, "mpegts_flags", "resend_headers", 0);
hls_rename_temp_file(s, oc);
}
if (hls->fmp4_init_mode) {
hls->number--;
}
if (!hls->fmp4_init_mode)
ret = hls_append_segment(s, hls, hls->duration, hls->start_pos, hls->size);
hls->start_pos = new_start_pos;
if (ret < 0) {
av_free(old_filename);
return ret;
}
hls->end_pts = pkt->pts;
hls->duration = 0;
hls->fmp4_init_mode = 0;
if (hls->flags & HLS_SINGLE_FILE) {
hls->number++;
} else if (hls->max_seg_size > 0) {
if (hls->start_pos >= hls->max_seg_size) {
hls->sequence++;
sls_flag_file_rename(hls, old_filename);
ret = hls_start(s);
hls->start_pos = 0;
/* When split segment by byte, the duration is short than hls_time,
* so it is not enough one segment duration as hls_time, */
hls->number--;
}
hls->number++;
} else {
sls_flag_file_rename(hls, old_filename);
ret = hls_start(s);
}
av_free(old_filename);
if (ret < 0) {
return ret;
}
if ((ret = hls_window(s, 0)) < 0) {
return ret;
}
}
ret = ff_write_chained(oc, stream_index, pkt, s, 0);
return ret;
}
static int hls_write_trailer(struct AVFormatContext *s)
{
HLSContext *hls = s->priv_data;
AVFormatContext *oc = hls->avf;
AVFormatContext *vtt_oc = hls->vtt_avf;
char *old_filename = av_strdup(hls->avf->filename);
if (!old_filename) {
return AVERROR(ENOMEM);
}
av_write_trailer(oc);
if (oc->pb) {
hls->size = avio_tell(hls->avf->pb) - hls->start_pos;
ff_format_io_close(s, &oc->pb);
if ((hls->flags & HLS_TEMP_FILE) && oc->filename[0]) {
hls_rename_temp_file(s, oc);
}
/* after av_write_trailer, then duration + 1 duration per packet */
hls_append_segment(s, hls, hls->duration + hls->dpp, hls->start_pos, hls->size);
}
sls_flag_file_rename(hls, old_filename);
if (vtt_oc) {
if (vtt_oc->pb)
av_write_trailer(vtt_oc);
hls->size = avio_tell(hls->vtt_avf->pb) - hls->start_pos;
ff_format_io_close(s, &vtt_oc->pb);
}
av_freep(&hls->basename);
av_freep(&hls->key_basename);
avformat_free_context(oc);
hls->avf = NULL;
hls_window(s, 1);
if (vtt_oc) {
av_freep(&hls->vtt_basename);
av_freep(&hls->vtt_m3u8_name);
avformat_free_context(vtt_oc);
}
hls_free_segments(hls->segments);
hls_free_segments(hls->old_segments);
av_free(old_filename);
return 0;
}
#define OFFSET(x) offsetof(HLSContext, x)
#define E AV_OPT_FLAG_ENCODING_PARAM
static const AVOption options[] = {
{"start_number", "set first number in the sequence", OFFSET(start_sequence),AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, E},
{"hls_time", "set segment length in seconds", OFFSET(time), AV_OPT_TYPE_FLOAT, {.dbl = 2}, 0, FLT_MAX, E},
{"hls_init_time", "set segment length in seconds at init list", OFFSET(init_time), AV_OPT_TYPE_FLOAT, {.dbl = 0}, 0, FLT_MAX, E},
{"hls_list_size", "set maximum number of playlist entries", OFFSET(max_nb_segments), AV_OPT_TYPE_INT, {.i64 = 5}, 0, INT_MAX, E},
{"hls_ts_options","set hls mpegts list of options for the container format used for hls", OFFSET(format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_vtt_options","set hls vtt list of options for the container format used for hls", OFFSET(vtt_format_options_str), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
#if FF_API_HLS_WRAP
{"hls_wrap", "set number after which the index wraps (will be deprecated)", OFFSET(wrap), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
#endif
{"hls_allow_cache", "explicitly set whether the client MAY (1) or MUST NOT (0) cache media segments", OFFSET(allowcache), AV_OPT_TYPE_INT, {.i64 = -1}, INT_MIN, INT_MAX, E},
{"hls_base_url", "url to prepend to each playlist entry", OFFSET(baseurl), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_segment_filename", "filename template for segment files", OFFSET(segment_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_segment_size", "maximum size per segment file, (in bytes)", OFFSET(max_seg_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, E},
{"hls_key_info_file", "file with key URI and key file path", OFFSET(key_info_file), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_enc", "enable AES128 encryption support", OFFSET(encrypt), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, E},
{"hls_enc_key", "hex-coded 16 byte key to encrypt the segments", OFFSET(key), AV_OPT_TYPE_STRING, .flags = E},
{"hls_enc_key_url", "url to access the key to decrypt the segments", OFFSET(key_url), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_enc_iv", "hex-coded 16 byte initialization vector", OFFSET(iv), AV_OPT_TYPE_STRING, .flags = E},
{"hls_subtitle_path", "set path of hls subtitles", OFFSET(subtitle_filename), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_segment_type", "set hls segment files type", OFFSET(segment_type), AV_OPT_TYPE_INT, {.i64 = SEGMENT_TYPE_MPEGTS }, 0, SEGMENT_TYPE_FMP4, E, "segment_type"},
{"mpegts", "make segment file to mpegts files in m3u8", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_MPEGTS }, 0, UINT_MAX, E, "segment_type"},
{"fmp4", "make segment file to fragment mp4 files in m3u8", 0, AV_OPT_TYPE_CONST, {.i64 = SEGMENT_TYPE_FMP4 }, 0, UINT_MAX, E, "segment_type"},
{"hls_fmp4_init_filename", "set fragment mp4 file init filename", OFFSET(fmp4_init_filename), AV_OPT_TYPE_STRING, {.str = "init.mp4"}, 0, 0, E},
{"hls_flags", "set flags affecting HLS playlist and media file generation", OFFSET(flags), AV_OPT_TYPE_FLAGS, {.i64 = 0 }, 0, UINT_MAX, E, "flags"},
{"single_file", "generate a single media file indexed with byte ranges", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SINGLE_FILE }, 0, UINT_MAX, E, "flags"},
{"temp_file", "write segment to temporary file and rename when complete", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_TEMP_FILE }, 0, UINT_MAX, E, "flags"},
{"delete_segments", "delete segment files that are no longer part of the playlist", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DELETE_SEGMENTS }, 0, UINT_MAX, E, "flags"},
{"round_durations", "round durations in m3u8 to whole numbers", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_ROUND_DURATIONS }, 0, UINT_MAX, E, "flags"},
{"discont_start", "start the playlist with a discontinuity tag", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_DISCONT_START }, 0, UINT_MAX, E, "flags"},
{"omit_endlist", "Do not append an endlist when ending stream", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_OMIT_ENDLIST }, 0, UINT_MAX, E, "flags"},
{"split_by_time", "split the hls segment by time which user set by hls_time", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SPLIT_BY_TIME }, 0, UINT_MAX, E, "flags"},
{"append_list", "append the new segments into old hls segment list", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_APPEND_LIST }, 0, UINT_MAX, E, "flags"},
{"program_date_time", "add EXT-X-PROGRAM-DATE-TIME", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_PROGRAM_DATE_TIME }, 0, UINT_MAX, E, "flags"},
{"second_level_segment_index", "include segment index in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_INDEX }, 0, UINT_MAX, E, "flags"},
{"second_level_segment_duration", "include segment duration in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_DURATION }, 0, UINT_MAX, E, "flags"},
{"second_level_segment_size", "include segment size in segment filenames when use_localtime", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_SECOND_LEVEL_SEGMENT_SIZE }, 0, UINT_MAX, E, "flags"},
{"use_localtime", "set filename expansion with strftime at segment creation", OFFSET(use_localtime), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
{"use_localtime_mkdir", "create last directory component in strftime-generated filename", OFFSET(use_localtime_mkdir), AV_OPT_TYPE_BOOL, {.i64 = 0 }, 0, 1, E },
{"hls_playlist_type", "set the HLS playlist type", OFFSET(pl_type), AV_OPT_TYPE_INT, {.i64 = PLAYLIST_TYPE_NONE }, 0, PLAYLIST_TYPE_NB-1, E, "pl_type" },
{"event", "EVENT playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_EVENT }, INT_MIN, INT_MAX, E, "pl_type" },
{"vod", "VOD playlist", 0, AV_OPT_TYPE_CONST, {.i64 = PLAYLIST_TYPE_VOD }, INT_MIN, INT_MAX, E, "pl_type" },
{"method", "set the HTTP method(default: PUT)", OFFSET(method), AV_OPT_TYPE_STRING, {.str = NULL}, 0, 0, E},
{"hls_start_number_source", "set source of first number in sequence", OFFSET(start_sequence_source_type), AV_OPT_TYPE_INT, {.i64 = HLS_START_SEQUENCE_AS_START_NUMBER }, 0, HLS_START_SEQUENCE_AS_FORMATTED_DATETIME, E, "start_sequence_source_type" },
{"generic", "start_number value (default)", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_START_NUMBER }, INT_MIN, INT_MAX, E, "start_sequence_source_type" },
{"epoch", "seconds since epoch", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_SECONDS_SINCE_EPOCH }, INT_MIN, INT_MAX, E, "start_sequence_source_type" },
{"datetime", "current datetime as YYYYMMDDhhmmss", 0, AV_OPT_TYPE_CONST, {.i64 = HLS_START_SEQUENCE_AS_FORMATTED_DATETIME }, INT_MIN, INT_MAX, E, "start_sequence_source_type" },
{ NULL },
};
static const AVClass hls_class = {
.class_name = "hls muxer",
.item_name = av_default_item_name,
.option = options,
.version = LIBAVUTIL_VERSION_INT,
};
AVOutputFormat ff_hls_muxer = {
.name = "hls",
.long_name = NULL_IF_CONFIG_SMALL("Apple HTTP Live Streaming"),
.extensions = "m3u8",
.priv_data_size = sizeof(HLSContext),
.audio_codec = AV_CODEC_ID_AAC,
.video_codec = AV_CODEC_ID_H264,
.subtitle_codec = AV_CODEC_ID_WEBVTT,
.flags = AVFMT_NOFILE | AVFMT_GLOBALHEADER | AVFMT_ALLOW_FLUSH,
.write_header = hls_write_header,
.write_packet = hls_write_packet,
.write_trailer = hls_write_trailer,
.priv_class = &hls_class,
};
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